The 38-year-old Brit paddled in the crystal clear waters in a yellow bathing suit while on holiday in Italy.
Gemma played Bond girl Strawberry Fields alongside Daniel Craig in 2008’s Quantum of Solace.
She is due to return to our screens this year in season two of Sky’s Funny Woman.
The star married Peaky Blinders actor Rory Keenan in 2019.
We revealed last year she gave birth to her first baby.
The British siren had previously admitted she was unsure about having kids.
She told The Times in 2013: “I don’t think you can ever plan the right, exact time.
“I don’t feel ready for kids because I want to know that I can come back and still be valuable to the industry.
“That’s only going to happen when I feel a little bit more accomplished… or at least when I’ve accomplished something of which I’m proud.”